TrackMeNot

Listed as one of the best Chrome security extension by "MakeUseOf": http://www.makeuseof.com/pages/best-chrome-extensions
TrackMeNot is a lightweight browser extension that helps protect web searchers from surveillance and data-profiling by search engines. It does so not by means of concealment or encryption (i.e. covering one's tracks), but instead, paradoxically, by the opposite strategy: noise and obfuscation. With TrackMeNot, actual web searches, lost in a cloud of false leads, are essentially hidden in plain view. User-installed TrackMeNot works with the Chrome Browser and popular search engines (AOL, Yahoo!, Google, and Bing) and requires no 3rd-party servers or services.